Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“you need to pay for the features you need”
Google Play · 3/5 · 2026-08-13

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 2907673729

Proof data

Record hash (SHA-256): b0fa523e3977ee5d32792810369827c1d2a8482ce8cab9315eb1147ec8f096f0
Signature (Ed25519, base64): nIXC5t3s5B8DbbEgGpqTNUwYStmxTzJkLSXve+mUBqho4qw/JqcTiP9ouX+KFQoqzW+oN6GkNuIf7Q49Ug6cCQ==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["b0fbb81bb287b5cf4a084414a5ae682178cbb7851898b8e7b5fc7fc8a3995d25","902dfea11ebbeaf42b761d6ed36ebce135302d5acb09333e7ff502f14d702c66","c55651ea1401779698965c8cdff6a5d31f7d7385f62f7053a29572091830b488","6b7d17129dc112048452acad3feaacd84fe394d982e1ee38691dc6a868a48b1e","f198aa32cc1af108b49df2908a7f17ac60dc68dd38cfe7184d2779b9f5f824a0","5e22aad37180d86aeed289dc1d2c961d0bb62740f5b5478c95c23bbf61a2de33","b595bd71c4180c2d9b60e897805f9b25f84cefaeb0d4919acd94fa2fef546e7f","545decc1e8c34f1435189e9f7824b80b560d61bf685136ce1aa15500e510cf08","85ff150ff75c780c74f98ebc9eec869687ac295f72c11aa64af2e4bc98bd73b6","aee526ca68fb9c032a3b580add14b26fe8d48f9f145846929d1b286460178d66","302781f826e4e27dfeeb952369e37835d487d944454c4a4129ac11187f525b5a","d0e82af4a03d7591b930166e680788d40e9d0f467d2d9124361d17c683e6610b","e73087a4c89fcbfd62483a37ad723e600377233e603592ed8ad92c5db69f30f2","05978e8b9ad5fd39833c65b8b951e8c80cf426334c441fa8a8bff8eb8eeaf534","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/price/en","quote":"you need to pay for the features you need","rating":3,"review_date":"2026-08-13","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (b9a08f9d6d76…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.